#include<iostream>
using namespace std;

int main()                                                                                          
{
    bool flag1=true;
    cout<<"flag1 is :"<<flag1<<endl;
    bool flag2=false;
    cout<<"flag2 is :"<<flag2<<endl;
    bool flag3=1;
    cout<<"flag3 is :"<<flag3<<endl;
    bool flag4=0;
    cout<<"flag4 is :"<<flag4<<endl;
    
    return 10;
}